Sir Gawain was the nephew of King Arthur, king of Britannia and later Space Britain, and the son of Morgause and King Lot. He became a Knight of the Round Table at a young age thanks to his prowess and chivalry. He had the unnatural ability to become empowered by sunlight, giving him great strength against evil.
Sir Gawain wears leather armour, thinner than the suits of armour most knights wear, and over it is a pale green tabard with white checkers. His tabard seems almost robe-like, extending right down to the floor and is much thicker than the others'. His hair is muddy blonde and very untidy, looking like he may have cut it himself when it got in his eyes too much. In some way he actually looks quite like King Arthur, who is his uncle[Pan 1].
Gawain is quite gullible, believing in exaggarated tales even when they're cast into doubt[Pan 1]. Gawain's best friend is Sir Galahad and he sees Sir Tristram as his mentor and an inspiration[Pan 2].
Sir Gawain has skills in biology, both in botany and in medicine, which he has taught to others, such as Sir Galahad[Pan 1].
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Sir Gawain became a member of the colonisation committee, those that planned the actual colonising of the humans' future world, due to abilities with plants. The group was headed by King Mark and Queen Iseult especially, while Sir Greene Knight, a nacaal, and the X-Krypton Gamma Pans, also joined the effort[Pan 1].